/*
 * @Description: 

 * @version: 
 * @Company: 
 * @Author: GeYang
 * @Date: 2019-11-14 15:51:49
 * @LastEditors: 
 * @LastEditTime: 2019-11-14 15:52:50
 */
function sayHi(){
    
    console.log(arguments[0] + arguments[1] + arguments[2]);

}

sayHi('hello', 'world' , '!');